Edgab m



(No Model.)

B. M. BIRDSALL & G. STRINGER. FEED MECHANISM FOR SAW MILL CARRIAGEfi PatentdJune 2, 1885.

WITNESSES I INVENTORS 1 JVIBirdsall. Bythez'rflttorneys G190. ISZ

ringe r.

. lliED Srrns -n'rnwr @rrrca EDGAR M. BIRDSALL AND GEORGE STRINGER, OF AUBURN, NEW YORK;

SAID STRINGER ASSIGNOR TO SAID BIRDSALL.

FEED MECHANISM FO R SAW-MILL CARRIAGES. A

SPECIFICATION forming part of Letters Patent 110,319,181, dated June 2, 1885.

application filed March 20, 1885. (N model.)

To all whom it may concern.-

Be it known that we, EDGAR M. BIRDSALL and GEORGE STRINGER, both of Auburn, in.

the county of Cayuga and State of New York, have invented certain new and useful Improvements in Mechanism and Gearing for Controlling the Movements of Carriages of Saw-Mills, of which the following is a specification, reference being had to the accompanying drawings, in which- 7 Figure 1 is a plan view of our improvements, and Fig. 2 avertical section on theline 2 2 of Fig. 1.

The object of our improvements is particularly to regulate the feed of saw-mill carriages which carry the timber to be sawed forward to the saw.

Referring to the letters upon the drawings, A indicates a suitable frame,npon which a circular saw, B, is mounted on a shaft, 0, in suitable bearings. Motion may be communicated to this shaft and saw in any usual manner, and a carriage having a rack (such as is usual, and is not illustrated) may be provided, the rack to engage with the rack-pinion D, which causes the travel of the carriage with its timber forward to the saw, and back again after the sawing is finished.

E E indicate rods or bars parallel with the saw-shaft, and supported at either end upon the main frame.

F indicates a sliding frame mounted upon the bars EB, and adapted to slide back and forth transversely of the main frame upon these supports. One of the bars E, being under the shaft 0, is indicated by dotted lines in Fig. 1.

G indicates a bevel-pinion provided with a hub, H, connected to the saw-shaft by a spline and groove, and which is adapted to slide under the pressure of the sliding frame back and forth upon the saw-shaft. This pinion gears with a pinion-wheel, I, mounted by means of a spline and groove upon a dlsk-shaft, K, having its bearings upon the sliding frame and carrying at its opposite end a friction-disk, L. The construction and organization of the parts described, it will be observed, are such that the pinion G always partakesof the motion of the saw-shaft, whatever may be its position upon the shaft, and drives the wheel I, the shaft K, and the disk L. Y a

In order to move the sliding frame and the gearing just described, we provide a series of frame will serve to move the sliding frame and the parts' it carries back and forth upon its two supports transversely of the main frame, as will be understood from the drawings. Such motion will cause the disk L to come in contact alternately with the two friction-wheels R and S, fixed upon the shaft T, which has its bearings at one end in the main frame, and at the other end in a pivotal bearing, U, supported by a movable yoke, V, which in turn is supported in a hollow support or hearing, W, fastened to the main frame, as illustrated. The shaft T carries a pinion, X, which gears with a wheel, Y, upon the shaft Z, to which the rack-pinion D is fixed. Whenever the disk L is in contact with the friction-wheel B, the wheel runs on an annular track, a, on the disk near its margin, and in such a direction as to cause the carriage to run back rapidly after the sawing is com pleted. -At the same time the wheel S will run .in the annular grooved of the disk, and be out of contact with the disk. When the disk is in contact with the friction-wheel S, it is out of contact'with wheel R, and it causes wheel S to run in the opposite direction, which drives the shaft Z in the opposite direction slowly, which drives the carriage forward toward the saw gradually to feed the timberrto be sawed. An arm, I), is pivoted at one end to a stud,'c, and connected with the movable yoke V. By means of the lever P the disk may be brought over opposite the friction-wheel S, and then the lever may be pushed forward, as indicated by the dotted lines in Fig. 2, which will push'the free end of arm b forward and cause friction-wheel S to bear against the-disk with suitable force :00

bedesired, whereby greater or less speedof rotation will be given to the friction-wheel S and a correspondingly slow or rapid feed'conr, municated to the log-carriage, at the will of the operator.

The bearing of the shaft T at its outer end upon the main frame is pivoted, as illustrated, so as to allow of the forward movement of the inner end of the shaft where the friction-wheel S is mounted. e

As there willnaturally be some wear upon the friction-wheels and disk, we provide ad- 7 justingor compensating mechanism.

We provide two sleeves, awith inclined adjacent ends between the end bearings of the diskL-shaft, and we make the shaft slightly longer :than would be necessary if it were not for wear. The sleeves areheld firmly in place upon theshaftby means of set-screwsf. Fig. Zillustrates the shaft in the position in which it would be in a new machine. Now, we will suppose the disk or the friction-wheels have become worn, and it is desirable to move the disk backward slightly. In that case the setserews are released, when theshaft can be drivenback as far as desired, the spline-andgroove connection with the pinion I admitting of such movement of the shaft. The sleeves, being inclined upon their faces,can be turned and slightly separated, so as to compensate--' for their own swear upon the opposite ends of the shaft-bearings. The set-screws can then be turned-.tofasten the sleeves firmly to the shaft; so that all wear and lost motion will be compensated.

.What we claim to be novel in the above-described organizationof mechanism is 1. In a circular-saw-carriage apparatus, thecombinatiomwith the main frame, of the shaft 0, mounted insuitable bearings thereon, and carrying the saw B, and the bBVGIiP ElO-D G, sliding by means of an ordinary spline and groove, the sliding frame F,mounted upon the crossvbars. E and the shaft 0, and carryingthe disk-shaft K, the disk L, and the bevel-pinion I,% geared with, the pinion G, so that reciprocating sliding movement may be simultaneously communicated to the parts G,I, F, K,

and L without disturbing their operative relations to each other or to the saw -shaft and i combination of the sliding frame F, mounted 1 as described, disk-shaft K anddisk L,mounted.

thereon, and the bevel-pinions I and G, communicating motion from shaft 0 to: shaft K n and disk L,with the friction-wheels R: and S,

mounted on shaft T, for alternately contacting the main frame, for sliding the frame Fand the operative parts it carries, and the pinion G, substantially as set forth.

4.. In a circular-saw -carriage apparatus, the combination of thepivoted lever P, the pivotedlink-connections M N O, and thesliding frame F, mountedon saw-shaft G and .cross bars E, the mechanism it, carries, and pinion- G, with the arm b and its movable yoke-eonnection with the endwisamov'ing shaft T, carrying the friction-wheels R and S,substantially as set forth.

5. In a circular-saw-ca'rriage apparatus, the

pinion G, mounted on the saw-shaft; the sliding frame mountedasdescribed, and thedisk f L, mounted thereon, 'con'nected with the pinion G, and having annulartrack a and groove 41, i

in combination with the frictiomwheels R S,

mounted on the endwi'se-moving shaft T,-

whereby they may be alternately brought into contact with the disk L, substantiallyas set forth.

6. In a circular-saw-carriage apparatus, the combination, with the disk-shaft K' and its bearings, the disk L, and the pinion I,;connected tothe disk-shaft by a sliding, connection or spline and groove, of sleeves e and their set screws, to compensate for wear upon the disk and friction-wheels R S, substantially as set forth..

Intestimony whereof we have hereunto subscribed our names.

EDGAR M. BIBDSALL. enonen srnruenn- Witnesses:

' T. J MosnER,

JNo. E. Bonn. 

